TY - JOUR T1 - Surveys, Symposia, and Transactions JF - Journal of Medical Genetics JO - J Med Genet SP - 366 LP - 366 DO - 10.1136/jmg.5.4.366-a VL - 5 IS - 4 AU - J. H. Thomson Y1 - 1968/12/01 UR - http://jmg.bmj.com/content/5/4/366.2.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -